The most common examples of guarantees not covered by ZM are illustrated, for a visual analysis.
Must be checked: if there is a ZM stamp on case, brand of another manufacturer, case with treatment yellow (dark) and machining marks. ZM parts are ‘’silver color’’. The ‘’yellow dark” indicates zinc plating with hexavalent chromium, that is forbidden in Brazil. The case are produced by the cold forming process and has smooth surface. Your treatment surface are white zinc plate Cr6+ free.
Must be checked: Excess oil on plunger and the internal part of relay. Do not use oil for plunger lubrication. New Starter relay are already lubricated, leaving no additional lubrication required.
Causes: Error in installation, oil leakage in vehicle engine.
Must be checked: presence of liquid inside the Starter Relay (sometimes turning the Relay from one side to another side, it is possible to observe the water outlet, sometime small amount); Relay totally covered by mud or surface oxidation.
Causes: Use the vehicle in flooded areas, washing the vehicle engine without the protection of the Relay.
Must be checked: Check, through the fixing holes, there is metallic sheen in the copper color. If there is attempt was made to fix the Start Relay with longer bolts than specified. The correct is to observe the colors: blue, black or white at the bottom of the fixing holes (color of the spool).
causes: Installation error.